## National Dishes of the United States: Hamburgers and Apple Pie

The concept of a national dish is one that best represents the culinary identity of a country. In the United States, while no official national dish has been proclaimed, hamburgers and apple pie are widely regarded as unofficial national dishes given their immense popularity and cultural significance.

### Hamburgers: America’s Beloved Sandwich

#### Origin and Evolution
The hamburger, which is essentially a sandwich consisting of a cooked ground meat patty, usually beef, placed inside a sliced bread roll or bun, has origins that are variously claimed by several countries. However, it was in the United States, during the early 20th century, that the hamburger truly began to take the form we recognize today. Its rise was propelled by the establishment of fast-food chains such as White Castle in the 1920s and later McDonald’s in the 1950s, which standardized the burger preparation process and made the dish widely accessible and affordable.

#### Cultural Impact and Popularity
The hamburger has become an icon of American cuisine and culture. It reflects America’s fast-paced lifestyle and emphasis on convenience and efficiency. The simplicity of a hamburger and its versatility (with countless variations in toppings and styles) have cemented its status. America's love for hamburgers is evident in its dominant presence in fast food. The dish is celebrated every year on May 28, which is recognized as National Hamburger Day.

#### Regional Variations
Despite its standard look, the hamburger enjoys various regional adaptations across the United States, such as the Green Chile Cheeseburger in New Mexico, made with the state's famous Hatch green chile, or the Jucy Lucy in Minnesota, renowned for its melted cheese core.

### Apple Pie: A Symbol of American Tradition

#### Historical Background
The apple pie, while rooted in European traditions brought over by early settlers, has been embraced in the United States with significant fervor. The phrase "as American as apple pie" encapsulates its strong cultural association with American identity. Early recipes date back to the 18th century in America, evolving over time to use different types of apples and crusts.

#### Significance and Representation 
Apple pie uses ingredients that symbolize American agriculture and reflect the historical importance of apple farming in North America. The dessert is deeply embedded in American tradition and is particularly prominent during American holidays such as Thanksgiving, Christmas, and the Fourth of July when apple pie is often consumed.

#### Variations and Innovations
In various parts of the country, distinctive versions of apple pie exist, such as the Dutch apple pie, which boasts a streusel topping and sometimes includes a cream and cinnamon custard filling. Another variant is the apple crumb pie, favored for its buttery crumb topping.

### Conclusion
Hamburgers and apple pie are dishes that not only demonstrate the rich and diverse gastronomic landscape of the United States but also represent key aspects of American culture: innovation, adaptability, and tradition. Their widespread consumption and significant cultural impact illustrate why they are considered among the unofficial national dishes of the United States, enjoyed by people across the country regardless of regional differences.